E764 -- Resolutio facilis quaestionis difficillimae, qua haec formula maxime generalis vvzz(axx+byy)2 + Δxxyy(avv+bzz)2 ad quadratum reduci postulatur

(An easy resolution to a most difficult question, where this most general form vvzz(axx+byy)2 + Δxxyy(avv+bzz)2 is required to be reduced to a square)


Euler considers quadratic forms axx + 2bxy + cyy, a little more general than his usual form. Biquadratic forms didn't seem to take off, though.

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